UPDATE: So maybe it wasn't official. Warner Bros. has removed the video. We will keep you posted if another version goes up.

Most of what we have heard about "Godzilla" from director Gareth Edwards, starring Aaron Taylor-Johnson, Elizabeth Olsen and Bryan Cranston, has been hearsay from the lucky crowds inside Hall H at San Diego Comic-Con this year and last.

The 2012 SDCC audience got a look at a concept teaser that was made before the project even went into production and laid out the tone for latest look at the legendary monster. Lucky for everyone else, that teaser has just gone online in what appears to be the first move of a viral campaign.

All the way back in early September, an official copy of that video appeared over on a YouTube channel, Akira Watanabe, without anyone noticing, under the title "Fat Boy," a reference to one of the atomic bombs that the U.S. dropped on Japan during World War II. The legacy of that attack is felt throughout the piece.

Check out the teaser after the jump!

As we've seen described in the SDCC recaps, the teaser is narrated by one of the scientists involved in the Manhattan Project, J. Robert Oppenheimer, who describes the literal and psychological fallout from his work on the A-bomb.

The scene we're treated to is horrific to say the least. A city lies in ruins, as seen from above, with bodies strewn everywhere, little more than specks on the destroyed landscape. It's clear that "Godzilla" won't ignore the collateral damage that most modern blockbusters turn an ignorant and blind eye to. (We're talking about you, "Man of Steel.")

The camera then moves to the flies swarming an enormous carcass that lies in some of the wreckage. It appears to be another kind of giant monster, one that may have lost a bout with Godzilla.

We then meet the victor of the monster battle, Godzilla, who looks more like the original design than the t-rex like model we saw in the previous U.S. adaptation.

What do you think of the first teaser for "Godzilla"? Let us know in the comments below and on Twitter!